Struct virt::VpIndex

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pub struct VpIndex(/* private fields */);
Expand description

The virtual processor index.

This value is used inside the VMM to identify the processor. It is expected to be used as an index into processor arrays, so it starts at zero and has no gaps.

VP index zero is special in that it is always present and is always the BSP.

The same value is exposed to the guest operating system as the HV VP index, via the Microsoft hypervisor guest interface. This constrains the HV VP index to start at zero and have no gaps, which is not required by the hypervisor interface, but it matches the behavior of Hyper-V and is not a practical limitation.

This value is distinct from the APIC ID, although they are often the same for all processors in small VMs and some in large VMs. Be careful not to use them interchangeably.

Implementations§

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impl VpIndex

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pub const fn new(index: u32) -> VpIndex

Returns index as a VP index.

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pub const BSP: VpIndex = _

VP index zero, corresponding to the boot processor (BSP).

Note that this being a constant means that the BSP’s HV VP index observed by the guest will always be zero. This is consistent with Hyper-V and is not a practical limitation.

Note that the APIC ID of the BSP might not be zero.

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pub fn index(&self) -> u32

Returns the VP index value.

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pub fn is_bsp(&self) -> bool

Returns true if this is the index of the BSP (0).

Trait Implementations§

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impl Clone for VpIndex

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fn clone(&self) -> VpIndex

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for VpIndex

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl Inspect for VpIndex

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fn inspect(&self, req: Request<'_>)

Inspects the object.
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impl Ord for VpIndex

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fn cmp(&self, other: &VpIndex) -> Ordering

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl PartialEq for VpIndex

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fn eq(&self, other: &VpIndex) -> bool

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl PartialOrd for VpIndex

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fn partial_cmp(&self, other: &VpIndex) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl Copy for VpIndex

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impl Eq for VpIndex

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impl StructuralPartialEq for VpIndex

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